FUEL PROCESSING TECHNOLOGY
·
2023
·
IF 7.5
Xiaohua Li,Haowen Fu,Shanshan Shao,Yixi Cai
Templating agents were created by utilizing several methods to handle natural cellulose (bagasse), and they were successfully used to treat HZSM-5 to introduce extra mesopores . In addition, the hierarchical HZSM-5 was employed in the catalytic pyrolysis of biomass to produce hydrocarbon fuels. The hydroxyl content in the templating agent could be promoted via hydrothermal and ultrasound-assisted treatment, improving their performance as templates to produce mesopores. The cellulose content in the templating agents was effectively boosted via hydrothermal-assisted treatment, whereas their relative crystallinity was improved by ultrasound assistance. The formation of mesopores was promoted with the increased cellulose content in the templating agents, and the catalytic performance in upgrading pyrolysis gas for aromatic hydrocarbons could be significantly improved. Higher relative crystallinity was advantageous for enhancing the stability of the templating agent in the catalyst synthesis system, and the formation of pore structures of the catalyst was promoted. Among all catalysts synthesized, catalysts synthesized by hydrothermal-assisted treatment (Cat-H(X)) presented the highest specific surface area and average pore size of 397.60 m 2 /g and 4.53 nm, which were about 1.41 and 1.98 times of commercial HZSM-5 (H-Z). The highest yield of BTX obtained with Cat-H(X) was 8.7 wt%, 1.81 times that obtained with H-Z.
研究领域:
能源科学
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材料科学
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产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2021
·
IF 4.539
Yubin Li,Yi He,Jia Zhuang,Heng Shi
Materials with superwettability have attracted much research interest over the last few decades in the field of water-oil separation. Distinct from other superwetting materials, dual superlyophobic materials that have superoleophobicity in water and superhydrophobicity in oil can perform on-demand oil/water separation without requiring extra energy. However, obtaining such a dual superlyophobic membrane with multifunctionality for application in a complicated wastewater environment remains a challenge. Taking advantage of both ZnO and polydopamine , a multifunctional PDA/SC/KFs@ZnO freestanding membrane was prepared in our study. This novel material displays dual superlyophobicity and has potential application for rapid and simultaneous separation of light and heavy oil-water mixtures, oil-in-water emulsions with soluble dye, and water-in-oil emulsions, as well as a good adsorption-catalysis performance for removing soluble dyes in water under visible light . Our work presents a facial and economic method that uses natural kapok fibers to fabricate a special multifunctional superwetting membrane that is promising for future applications.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Xingtao Ma,Ying Liang,Fei Wu,Zimei Zhu,Chunmiao Xia,Huan Liu,Cuige Zhang,Maodong Xu
Janus emulsions have particularly drawn researchers' attention due to their asymmetrical morphology and anisotropic characteristics. However, except for Janus emulsions with liquid-liquid structures, other types of Janus emulsions have not been studied yet. Inspired by the occasional discovery that the water film on the foam surface freezes and transforms into a hard solid interface film below freezing point, a Janus emulsion was developed by using the phase change characteristics of solid paraffin wax. In this study, decane or perfluorooctane was used as the oil phase (O), solid paraffin wax as the solid interfacial film (S), and solutions of sodium dodecyl sulfate (SDS) or natural cellulose particles as the water phase (W). By controlling temperature and microgravity, hemispherical (O + S)/W and (S + O)/W type Janus phase change emulsions were successfully prepared. The experimental results show that paraffin wax content, oil phase density and polarity have significant effects on the stability and microstructure of emulsions. By calculating and fitting the solid-liquid interface ratio of Janus emulsions, the quantitative relationship between solid-liquid interface ratio, surfactant concentration and oil phase composition was obtained. This provides a theoretical basis and experimental basis for interface solid-state encapsulation and regulation.
研究领域:
化学工程
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2018
·
IF 5.091
Tianxiang Lan,Rui An,Zheng Liu,Kaijun Li,Jun Xiang,Gongyan Liu
The stable and efficient immobilization of silver nanoparticles (AgNPs) on/into processable biomass-based macro-support with porous networks is a promising and sustainable strategy to achieve both high catalytic activity and excellent reusability for heterogeneous catalysis . In this work, a collagenic composite film was facilely fabricated at room temperature , via the self-assembly of natural collagen fibers (CFs) and gallic acid modified silver nanoparticles (GA@AgNPs) induced by chromium (III) cross-linking in water. The morphology and microstructure of such GA@AgNPs-Cr-CFs composite film was investigated by Scanning Electron Microscope (SEM) and X-ray Photoelectron Spectroscopy (XPS), respectively. The results revealed that the cross-linking based on the coordinated complexation between chromium ions (Cr 3+ ) and carboxyl groups on CFs and GA@AgNPs played the critical role in the interwoven of collagen fibers, leading to a three dimensional (3D) interconnected porous network of the composite film with simultaneously incorporation and high payload of silver nanoparticles. Furthermore, this GA@AgNPs-Cr-CFs composite film exhibited excellent catalytic activity toward the reduction of 4-nitrophenol (4-NP), taking the advantage of its high specific surface area given by the interwoven fibrous network structure. More than that, such sustainable composite catalyst could be easily recovered and reused for ten cycles because of its high stability based on cross-linking. This catalytic platform constructed by natural fibers , noble metal nanoparticles and trivalent metal ions showed a sustainable avenue for heterogeneous catalytic system.
研究领域:
材料科学
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环境科学
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化学工程
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产品关联
DOI
PubMed
高影响因子
Journal of Environmental Chemical Engineering
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2022
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IF 7.968
Yuan Fang,Ai Lu,Dongmin Zhao,Kaihua Su,Zhuoyan Li,Ying Wang,Xing-Can Shen,Kui Liu,Changping Ruan
Effectively eliminating mercury pollution in aqueous solutions remains an onerous task and important environmental challenge for protecting the public health and environment. Herein, we report a facile one-step hydrothermal approach to synthesis widened molybdenum disulfide (W-MoS 2 ) nanosheets/natural cellulose fiber composite (W-MoS 2 /NCF) for highly efficient elimination of Hg(II) from aquatic systems. Benefiting from the synergistic advantages of the intrinsically sulfur-rich characteristic of W-MoS 2 combined with its enlarged interlayer spacing (0.94 nm) that fully exposes the sulfur atoms as binding sites, as well as the vertical immobilization of W-MoS 2 nanosheets on the cellulose fibers that enables the easy accessibility of all the S binding sites, the maximum adsorption capacity of W-MoS 2 /NCF towards Hg(II) was 1206 mg g −1 , implying that almost all the S binding sites were fully utilized for mercury uptake. Moreover, the 3D structure characteristics can not only avoid the self-aggregation of 2D nanosheets , but also benefit the removal, regeneration, and reuse of this composite in practical application by offering convenient operations. In consequence, the W-MoS 2 /NCF outperformed the most of MoS 2 -based composites in terms of mercury removal capacity, utilization efficiency of S, operation convenience, and recyclability . Taken together, the combination of the advantages of its excellent Hg(II) capture performance, facile and scalable synthesis process, the easy availability of raw materials, easy recyclability and reusability endowed the as-prepared W-MoS 2 /NCF with promising potential for being used as a highly effective scavenger to decontaminate Hg(II) contaminated wastewater.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
Materials
·
2022
·Vol. 15
·期 9
·3358
·
IF 3.748
Wenqian Li,Yanli Dou,Xuefei Li,Shengbo Fang,Jian Li,Quanming Li
In this paper, a flame-retardant, UV-cured coating was prepared on the fiber composites’ (FC) surface via a thiol-ene click reaction using pentaerythritol tetra(3-mercaptopropionate) (PETMP), triallyl cyanurate (TAC), and 2-hydroxyethyl methacrylate phosphate (PM-2). The synergistic effectiveness of phosphorus (P), nitrogen (N), and sulfur (S) was studied in detail by changing the proportion of these reactants. Sample S4(N3P2)6,with a molar ratio of N and P elements of 3:2, and the thiol and vinyl groups of 4:6 had the highest LOI value (28.6%) and was self-extinguishing in the horizontal combustion test. It had the lowest peak heat release rate (PHRR) value (279.25 kW/m2) and total smoke production (2.18 m2). Moreover, the thermogravimetric analysis (TG) showed that the decomposition process of the coated composites was delayed. The conversion rate of the double bond and the thiol of S4(N3P2)6was 100% and 92.0%, respectively, which showed that the cross-linked network structure was successfully formed. The tensile strength and the flexural strength of coated composites improved, and the transparency of the coating can reach 90%. These characteristics showed that the UV-cured coatings could be used in industrial production to effectively prevent fires.Keywords:UV-curable coating;thiol-ene click reaction;flame retardancy;natural fiber
研究领域:
材料科学
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化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Gels
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2024
·Vol. 10
·期 11
·742
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IF 5
Fengbao Liu,Da Yin,Jinsheng Sun,Xiao Luo,Xianbin Huang
In order to use intelligent gel systems to realize deep source water control in medium and high water cut reservoirs, and also to solve the shortcomings of conventional gels, such as the high chemical dose required, large profile control radius, poor temperature resistance, shear resistance, and plugging performance, a temperature-sensitive gel based on natural cellulose was developed, and the temperature resistance, rheological performance, and plugging performance of the temperature-sensitive gel were tested and evaluated. The results show that the system can maintain a viscosity retention rate of up to 95% after high-temperature aging at 90–120 °C for 50 days. When using medium- to low-salinity calcium chloride formation water for preparation, the gelation effect is good. The rheometer oscillation frequency scanning test shows that the system gel is a strong elastic body dominated by elasticity. The core displacement experiment shows that the highest sealing rate of the system is 97%, and the breakthrough pressure can reach 2.5 MPa at this time. The microstructure of the gel system was tested by infrared, and it was found that the gel system had strong hydrogen bonding and the gel had good stability. The research results contribute to improving the recovery rate of high water cut oil reservoirs.
研究领域:
石油工程
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of CO2 Utilization
·
2022
·
IF 8.321
Ying Wang,Kai Yan,Zi-Qing Du,Jia-Jie Long
A special magenta dye SCFX-AYRL with dichlorotriazine as reactive group, designed as one of supercritical trichromatic dyes, was successfully synthesized for sustainable coloration of natural fibers in supercritical fluid of carbon dioxide (SCF-CO 2 ). The products were characterized and tested by FT-IR, 1 H NMR, LC-MS, EA and Uv-Vis spectra. Moreover, Gaussian software was also employed to assist a theoretical design of the dye and its precursor, such as the optimization of structure conformations, the calculation of frontier molecular orbitals and parameters, and the prediction of characteristic absorption wavelength. The obtained results show that the molecular structure and color characteristics of the synthesized dye well met the expected theoretical design and calculations. Particularly, the powerfully excited molecular orbitals facilitated the first electron transition from the highest occupied orbital (HOMO) to the lowest unoccupied molecular orbital (LUMO) by contributing characteristic singlet absorption bands for the precursor and its target dye. Moreover, an energy gap (Δ E ) calculation between the LUMO and the HOMO was performed to predict color hue shift, and was well consistent with experimental detects. A successful application of the special dye on natural protein fibers was observed for eco-friendly coloration in SCF-CO 2 with high color strength, fixation efficiency over 90.0 %, as well as high brilliant color and fastness.
研究领域:
化学工程
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纺织科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Shaoping Ma,Changyong Cai,Xuhong Guo,Zhijian Tan
Membranes have been used as versatile tools for the separation of various natural products; however, the selective separation of structural analogs of natural products using membranes remains challenging. In this study, biocomposite membranes based on poly(ionic liquids) and different natural fibers (jute, cotton, or wool) were successfully prepared. Natural fibers can regulate the microstructure and improve the mechanical properties of membranes. Fourier transform infrared spectroscopy, nuclear magnetic resonance spectroscopy, scanning electron microscopy, X-ray photoelectron spectroscopy, atomic force microscopy, Brunauer-Emmett-Teller analysis, and thermo gravimetric analysis were used to characterize the membranes. The membranes were used to separate tanshinone homologs (tanshinone I, tanshinone IIA, cryptotanshinone, and dihydrotanshinone I), allowing cryptotanshinone to penetrate the membrane while rejecting tanshinone I. A maximal selectivity of 44.57 % was obtained for the tanshinone homologs using a one-step separation protocol. These poly(ionic liquids)/natural fiber membranes possess high water flux, good self-cleaning, and good antibacterial properties. The membranes were effective in separating tanshinone homologs and have the potential to separate other natural homologs.
研究领域:
材料科学
·
天然产物化学
·
分离技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CARBOHYDRATE POLYMERS
·
2024
·
IF 10.7
Qianwen Lu,Hengfeng Li,Zhijian Tan
Wearable electronics significantly impact health monitoring, clinical care, and human-machine interfaces. Eutectogels, which utilize deep eutectic solvents (DES) address the drawbacks of hydrogels, such as weight loss and poor temperature tolerance, as well as the high costs and toxicities associated with ionogels. Despite these advances, most eutectogels serve only as sensors or epidermal electrodes and rarely fulfill both functions simultaneously. In this study, we present a multifunctional eutectogel designed to function in both ways. Incorporating natural cotton cellulose nanofibers as nanofillers reinforced the tensile strength of the resultant eutectogel by 7.47 times compared to that of the pure eutectogel, reaching 4.93 MPa. This eutectogel exhibited high ionic conductivity (1.22 S m −1 ), strong adhesion (1562.2 kPa to iron), self-healing ability (80.37% strain recovery and 80.53% tensile strength recovery), a broad temperature tolerance (−40 to 80 °C), and antibacterial properties. It demonstrates high sensitivity for the real-time strain detection of human activities and accurately captures electrophysiological signals, enabling the control of a small car. This versatile eutectogel has excellent potential for use in flexible wearable electronics.
研究领域:
材料科学
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生物医学工程
·
柔性电子
✓ 已验证
产品关联
DOI
PubMed
高影响因子
FIBERS AND POLYMERS
·
2024
·Vol. 25
·期 5
·1815-1824
·
IF 2.2
Xu Jiwei,Zhao Hongjuan,Zhao Qian,Xiong Xiaoqing,Zheng Laijiu,Jiao Chengqi
The color-rendering abilities of esterified natural dyes are influenced by the structure of their parent dyes and the position at which the ester group is introduced, resulting in low efficiency in screening and synthesizing suitable esterified natural dyes for dyeing natural fibers with supercritical carbon dioxide. In this study, density functional theory was used to quickly screen the parent natural dyes and esterification position of natural dyes. The findings indicated that B3LYP/def2-TZVP level and CAM-B3LYP (ω = 0.01)/def2-TZVP level yield the most accurate UV–vis absorption spectra calculations for natural dyes and their esterified derivatives, as evidenced by the smallest error compared to experimental values. The rutin, the carminic acid, and the icariin as the parent dyes were more suitable for esterification, and the introduction of ester groups solely on the glycosides of these dyes had negligible impact on their color-rendering abilities. Furthermore, considering the influence of ester groups on natural dye solubility, it was observed that the dyeing properties of glycoside esterified products derived from rutin, carminic acid, and icariin were better than those of their parent dyes, rendering them more appropriate for dyeing natural fibers in supercritical carbon dioxide.
研究领域:
化学
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材料科学
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产品关联
DOI
高影响因子
Advanced Science
·
2018
·Vol. 6
·期 1
·1801368
·
IF 12.441
Yue Fan,Yan-Qin Zhang,Kai Yan,Jia-Jie Long
Disperse reactive dyes with appropriate chemical structure are key for the coloration of natural fibers in the water-free environmentally friendly medium of supercritical carbon dioxide with various advantages. The objective of this work is to design and synthesize a novel anthraquinonoid disperse reactive dye involving a versatile bridge group to improve the coloration properties of the dye in supercritical carbon dioxide. Cross-coupling condensation based on an Ullmann reaction between N -phenylethylenediamine and 1-chloroanthraquinone in a ligand-free system is investigated by optimizing the synthesis parameters. Notable influences are observed from the dosages of N , N -dimethyl formamide and potassium hydroxide, as well as the system temperature and reaction duration, on the isolated yield of the dye precursor. An optimized process is also recommended for synthesizing the designed novel dye. Then, the chemical structure, color characteristics, and coloration properties of the obtained dye are further investigated and successfully characterized by utilizing Fourier-transform infrared analysis, 1 H and 13 C nuclear magnetic resonance spectroscopy, UV–vis absorption spectroscopy, elemental analysis, and liquid chromatography-mass spectrometry. Additionally, practical coloration experiments are performed with cotton, silk, and wool in a supercritical carbon dioxide medium.
研究领域:
化学工程
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纺织科学
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环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）